At Astrotech Space Operations in Titusville Fla. the STEREO spacecraft A rests on a tilt table.

At Astrotech Space Operations in Titusville, Fla., the STEREO spacecraft "A" rests on a tilt table for testing. On the table, the observatory will be tilted down so that technicians can perform the final comprehensive performance test of the instruments, verifying the instrument is fully functional before flight. This configuration also allows deployment tests to be done on the solar arrays. STEREO stands for Solar Terrestrial Relations Observatory. The STEREO mission is the first to take measurements of the sun and solar wind in 3-dimension. This new view will improve our understanding of space weather and its impact on the Earth. STEREO is expected to lift off aboard a Boeing Delta II rocket on July 22. Photo credit: NASA/George Shelton